Tooth width and helix angle are the main parameters that affect the time-varying contact line of helical gears. Figure 1 shows the influence of tooth width on the meshing force of contact line and tooth surface. It can be seen from Figure 1 (a) that with the increase of...
Tooth surface roughness and lubricating oil viscosity are the main factors that affect the friction coefficient of tooth surface. Through the effect of friction, the meshing force of tooth surface will change. Figure 1 shows the influence of working parameters on the meshing force of tooth surface. It can...
With the same parameters, the average meshing efficiency obtained is compared with the results as shown in Figure 1. It can be seen that the results are consistent as a whole, and the value is slightly larger than the result, because only the influence of sliding friction is considered,...
The instantaneous meshing efficiency of helical gears is defined as: Where, Tp and Tg are the torque of main and driven wheels respectively, N · mm. If the rolling friction between meshing tooth surfaces is ignored and only sliding friction is considered, the instantaneous meshing efficiency of helical gears...
In the process of helical gear meshing, the friction coefficient of tooth surface will change significantly with the change of speed, load distribution on tooth surface, tooth profile surface topography and other factors. On the basis of elastohydrodynamic lubrication, Xu H et al. added factors such as tooth surface...
As shown in Figure 1, the length of the contact lines on the left and right sides of the pitch line changes during the engagement of a single pair of helical gears from entry to exit. In Figure 1, εα Is the end face coincidence; εβ Is axial coincidence;...
It can be seen from Figure 1 that the relative sliding directions on both sides of the pitch line on the meshing surface are different, which leads to the change of friction on both sides of the pitch line. If it is specified that the friction on the contact...
Tooth friction is the main factor affecting the vibration noise and power loss of helical gear transmission system. It will not only accelerate the initiation of early faults such as wear, pitting, cracks, etc. of helical gears, affect the dynamic characteristics of transmission system, but also have an important...
According to the change rule of the contact lines on the left and right sides of the pitch line in the figure, the friction arm hLp and hRp at the midpoint of the contact lines on both sides of the pitch line of the helical drive wheel can be...
Ideally, the meshing form of spur gear pair is shown in Figure 1. It can be seen that one end of the gear teeth is “perfectly engaged”, and the other end has a certain gap due to the existence of backlash. However, due to errors, time-varying meshing stiffness and...